[HDFS-5119] Persist CacheManager state in the edit log

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HDFS-4949
• Fix Version/s: HDFS-4949
• Component/s: namenode
• Target Version/s: HDFS-4949
• Hadoop Flags: Reviewed
• Assignee: Andrew Wang
• Reporter: Colin McCabe
• Created: 21/Aug/13 21:00
• Updated: 06/Oct/13 22:22
• Resolved: 04/Oct/13 17:46

Description

CacheManager state should be persisted in the edit log. At the moment, this state consists of information about cache pools and cache directives. It's not necessary to persist any information about what is cached on the DataNodes at any particular moment, since this changes all the time.

Issue Links

• is related to: HDFS-5313 NameNode hangs during startup trying to apply OP_ADD_PATH_BASED_CACHE_DIRECTIVE.